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Radiology Exam: Computed Tomography (CT or CAT) Scan

A computed tomography scan, commonly referred to as a CT scan, is a diagnostic medical imaging exam. CT uses X-rays to produce multiple detailed images of inside the body, including organs, blood vessels and other soft tissues.

CT scans may use a contrast agent to better visualize internal organs and tissues in the images. Contrast is typically given through an IV line or taken by mouth.

CT Scan: What You Need to Know

Radiology technologist preparing patient for CAT scan.
  • CT scans are used to help diagnose a range of conditions including infections, cancer, heart disease, internal injury, musculoskeletal disorders or gastrointestinal disease.
  • CT is also used as part of other radiology exams and procedures, such as a fluid or tissue biopsy, computer tomography angiography, virtual colonoscopy or PET/CT scans.
  • CT scans use a small amount of X-ray radiation to generate images. A patient's exam dose is customized to ensure the best possible image quality while minimizing radiation dose.
  • A CT scan can be safely performed if you have an implanted device, such as an insulin pump or pacemaker.

Why Choose Johns Hopkins Radiology for CT scans?

Our Physicians

Our diagnostic radiologists have subspecialty training in interpreting CT images of all areas of the body. Our state-of-the-art equipment and technology are combined with providing the highest level of patient care.

Find a Johns Hopkins radiologist who specializes in CT scans.


Our Locations

Bone density scans may be done on an outpatient basis or as part of a hospital stay. A bone density scan using DEXA or CT are offered at all of our locations. To schedule an exam, call 443-997-7237.

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